Questions & Answers about Hún tekur gleraugun af borðinu og gefur mér þau.
In Icelandic, gleraugu is normally a plural noun, just like English glasses. So gleraugun means the glasses.
You can think of it as a plural-only noun in ordinary use. Icelandic usually does not need a structure like a pair of glasses unless you specifically want to emphasize the pair.
The ending shows that the noun is definite: the glasses rather than just glasses.
A very important Icelandic pattern is that the is often attached to the end of the noun instead of being a separate word.
So:
- gleraugu = glasses
- gleraugun = the glasses
For a learner, the safest approach is to memorize gleraugun as the definite form of gleraugu.